The iLiving 40W Hybrid Solar Attic Fan is the better solar attic fan overall, rated 3.4 to 2.8. The iLiving 40W Hybrid Solar Attic Fan leads on features. The QuietCool AFR SLR SMT 50W Roof Fan wins on panel. The iLiving 40W Hybrid Solar Attic Fan costs $94.01 less ($344.99 vs $439).
A well equipped hybrid roof fan with a long warranty at a mid range price, for medium attics. Buy the 301A, which includes the night adapter for the same price as the 301.
Amazon $344.99For a homeowner who wants to watch and control attic conditions from a phone and run around the clock. Buyers after the most airflow per dollar should look elsewhere.
Amazon $439.99 QuietCool $439Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every roof mount solar attic fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | iLiving 40W Hybrid Solar Attic Fan | QuietCool AFR SLR SMT 50W Roof Fan |
|---|---|---|
| Overall rating | 3.4/5 | 2.8/5 |
| Value 25% | 39 $0.30 per CFM ($344.99, 1,150 CFM) | 24 $0.39 per CFM ($439, 1,119 CFM) |
| Airflow 15% | 29 1,150 CFM | 27 1,119 CFM |
| Panel 20% | 60 40 W panel | 80 50 W panel |
| Features 15% | 100 thermostat, AC backup, separate or tilting panel | 70 thermostat, AC backup |
| Warranty 25% | 58 15-year warranty | 0 warranty not published, scored as none |
| iLiving 40W Hybrid Solar Attic Fan | QuietCool AFR SLR SMT 50W Roof Fan | |
|---|---|---|
| Airflow | ||
| Mount | Roof | Roof |
| Airflow | 1,150 CFM | 1,119 CFM |
| Attic area | 2,900 sq ft | 1,500 sq ft |
| Fan | 14 in | - |
| Motor | brushless, IP68 | DC |
| Power | ||
| Panel | 40 W | 50 W |
| Separate or tilting panel | Yes | - |
| Thermostat | Yes | Yes |
| AC backup | Yes | Yes |
| Build | ||
| Weight | 32 lb | - |
| Warranty | 15 years | - |
| Released | 2020-05 | 2026-06 |
